(7-5-2+148-147+9) x 9669,546
=(0+10) x 9669,546
=10 x 9669,546
=96695,460
(7-5-2+148-147+9) x 9669,546
=(0+10) x 9669,546
=10 x 9669,546
=96695,460
2 | + | 2 | + … + | 2 | = | |
5 x 7 | 7 x 9 | 145 x 147 |
|
Tích sau có tận cùng bằng bao nhiêu chữ số 0
a, 36 x 37 x 38 x...x 76 x 77
b,5 x 7 x 12 x 15 x 16 x 25 x 35 x 55 x 75
c, 147 x 148 x 149 x...x 317
a,6/15=8/y
b,x/5=6/10
c,2/3=12/x
d,24/26=x/12
e,14/56=1/x
g,x/125=2/2
h,6+x/33=7/11
i,5/7=y/147
k,5/7=y/147
l,4/x=y/21=28/49
m,3*x-5/60=2/3
n,2/3*x=3*9
o,24/120=x/5
a, x/147 = 5/7 ; b, x -2/36 = 7/12
Tính tổng sau:
149-148+147-146+...+3-2
a 1/30+2/42+3/56+....+4/380
b 3-5+7-9+................+143-145+147
a 1/30+2/42+3/56+.....+4/380
b 3-5+7-9+.....+143-145+147
Tình nhanh
a) 18x 76 +24x -150
b) 147+230+53+70
c) 7x 85+27 x 7-7 x 12
D) 2va3/5 -2/5x( 5/8-7/12)
1. sắp sếp các phân số sau theo thứ tự tăng dần
a) 3/5 ; 2/7 ; 9/8 ; 11/4 ; 6/6
b) 2/3 ; 5/6 ; 4/5 ; 8/9 ; 11/12
c) 11/10 ; 19/18 ; 14/13 ; 17/16 ; 15/14.
2.
a) 14 - ( 17 : 2 + 3\(\frac{1}{2}\))
b) 12 + 64 : ( 3 - 1\(\frac{2}{3}\))
3.
a) \(\frac{5}{7}\)= \(\frac{x}{147}\)
b) ( 627 - 138 ) : ( x : 2 ) = 163